cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A222877 Number of nX7 0..3 arrays with no more than floor(nX7/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

Table of values

n a(n)
1 438
2 6013669
3 66248732403
4 1036481888251762
5 11989849992460360377
6 192967638304466060567720
7 2288814374497410957902034456
8 37306843891418465461998644495695
9 449110977900671215379544970452138247

List of values

[438, 6013669, 66248732403, 1036481888251762, 11989849992460360377, 192967638304466060567720, 2288814374497410957902034456, 37306843891418465461998644495695, 449110977900671215379544970452138247]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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